you had a digital audio recording that you could hear but not as well as you wanted to? It needed to be very audible and easy to understand/ I've been told there is software you can buy to "enhance" the sound. Is this so? Are there services that can clarify sound in such a case??
Audacity is a freeware program that can be used to edit audio files including increasing the volume, etc. http://audacity.sourceforge.net